George jobson



No. 624,656. Patented May 9, 1899. G. JOBSON. LOOKOUT WINDOW.

(Application filed. Sept. 3, 1898.)

'(No Model.)

J m/5W m: Nonms Perms co, PHOTO-LITHO..-\.VASHXNGYGN, 0' a.

' would otherwise cloud up the glass of the safety.

NITED STATES PATENT OFFICE.

enonen onson, or LONDON, ENGLAND.

LOCKOUT-WINDOW.

SPECIFICATION forming part of Letters Patent No. 624,656, dated May 9, 1899. Application filed September 3, 1398. Serial No. 690,181. (No model.)

To ctZZ whont it nut/y concern:

Be it known that I, GEORGE JOBSON, a subject of the Queen of England, residing at London, England, have invented certain new and useful Improvements in Lookout-\Vindows, of which the following is a specification.

This invention relatesto a means of keeping lookout windows or openings-such as are found on locomotives, steamboats, lighthouses,watch-towers, and thelike=elean and clear during stormy weather; and it consists of an arrangement by which a current of air is maintained in front of the window in such a manner as to stop, repel, or divert particlessuch as rain, snow, or sandwhieh window or tend to injure the face or eyes of the lookout man if the opening be not glazed,

the advantage being that a keener and more careful watch can be kept with comfort and In carrying out the invention I surround the window with a bonnet-shaped hood,which tends to protect-the window from bad weather coming from any point except that directly facing it. \Vithin the hood I arrange one or more jets connected in any suitable manner with a supply of compressed air. The jet or jets are pointed in such a manner that the whole mouth or entrance of the hood is protected byacurrent of air directed from within outward at a velocity sufficient to overcome the atmospheric pressure from without inward, preventing any foreign bodies carried by the atmosphere entering the hood an d 001- lecting on the window-glass or passing through the opening if unglazed.

In the accompanying drawings, Figure 1 shows a convenient arrangement for applying the invention to the cab of a locomotive. Fig. 2 is a vertical section of an alternative form of hood.

In Fig. 1, A is the front of a locomotivecab with two outlook-windows B, the righthand window and hood being cut away to more clearly show the arrangement. The

glass 0 of each window is surrounded by a bonnet or hood D, preferably cone-shaped, in the lower portion of which is fixed a pipe E, v terminating in an opening E, which is pref- I erably shaped so as to deliver a spreading jet of air out at the opening of the hood, which it should completely fill. The pipe E is conveniently carried within the cab and provided with a valve E to enable the driver to control the apparatus. Beyond the valve the pipe may be connected either directly with a'fan or pump or other form of compressor or to a reservoir of compressed air placed in any'convenient position. It the locomotive be supplied with air-brakes, the pipe E may draw its supply from the air-reservoir of the same, or the pipe may be connected with the suction of an air pump or fan, so as to draw air out of the hood D instead of delivering a blast of air into the hood. In this case the pipe E is desirably of a larger capacity than when used for delivering the air into the hood. It is of course evident that two or more jets may be arranged in each hood and that the arrangement here shown applied to a locomotive is equally applicable to an outlook-window on a steamboat orin a stationary building.

' In Fig. 2 a hood is shown fitted with two internal conical rims D D the smaller diameter of the front rim D facing toward the opening of the hood and the smaller diameter of the back rim D toward the glass 0. The hood may be made of metal or other suitable material. If desired, it may be constructed of-toughened glass, so as to give a wider range of vision in fine weather.

To enable the opening to be readily adjusted from the inside of the cab, the glass 0 would be hinged or otherwise removably secured to the cab.

I claim.

1. In adevice for protecting a lookout-wim dow, the combination with a hood surrounding the window, of means for circulating air through the hood, substantially as and for the purpose described.

2. In a device for protecting a lookout-window, the combination with a hood surroundingthe window, of an air-jet, substantially as and for the purpose described.

In witness whereof I have hereto set my hand in the presence of two subscribing witnesses. A

, GEORGE JOBSON. WVitnesses:

THOMAS HARVEY, HERBERT WARD HARVEY. 

